Currently, the industry of mining machines and appliances in Poland, as a result of considerable economic improvement on the market of energetic resources, gains an incredible opportunity for further development. However, its use is de-pendent on the intensification of activity...

Currently, the industry of mining machines and appliances in Poland, as a result of considerable economic improvement on the market of energetic resources, gains an incredible opportunity for further development. However, its use is de-pendent on the intensification of activity...